1243164115 has 4 divisors (see below), whose sum is σ = 1491796944. Its totient is φ = 994531288.

The previous prime is 1243164101. The next prime is 1243164127. The reversal of 1243164115 is 5114613421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243164115 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124316407 + ... + 124316416.

It is an arithmetic number, because the mean of its divisors is an integer number (372949236).

Almost surely, 2^1243164115 is an apocalyptic number.

1243164115 is a deficient number, since it is larger than the sum of its proper divisors (248632829).

1243164115 is an equidigital number, since it uses as much as digits as its factorization.

1243164115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248632828.

The product of its digits is 2880, while the sum is 28.

The square root of 1243164115 is about 35258.5325134215. The cubic root of 1243164115 is about 1075.2500921646.

Adding to 1243164115 its reverse (5114613421), we get a palindrome (6357777536).

The spelling of 1243164115 in words is "one billion, two hundred forty-three million, one hundred sixty-four thousand, one hundred fifteen".